Train with iTweenPath and HingeJoints Problem

Hi all,

I am trying to make a train that follows an iTweenPath. There aren't any "How to make a train following a track" - Tutorials, but I am glad that I reached this so far:

On the train (which consists only of the engine before play mode) I have a script in which one can define its carriages via a list.

When the game is started, it instantiates the carriages and connects their rigidbodies with the previous segment, e.g.:

Carriage 0 will have on its HingeJoint component the engines' Rigidbody,

Carriage 1 will have on its HingeJoint component Carriage 0' Rigidbody, and so on (the last will of course have no one).

I run the train with this code snippet:

 iTween.MoveTo(gameObject, iTween.Hash("path", iTweenPath.GetPath("TrainTrack"), "time", 30, "orientToPath", true, "easetype", iTween.EaseType.easeInOutSine));

Here is the Problem:

Notice how the carriages are not following the line and even the engine is not facing 100% in the right direction to the path.

If I set the code snippet above to all the carriages, it will mess up the train.

Thanks in advance!